1325020221 has 24 divisors (see below), whose sum is σ = 2283483840. Its totient is φ = 757153656.

The previous prime is 1325020219. The next prime is 1325020231. The reversal of 1325020221 is 1220205231.

It is not a de Polignac number, because 1325020221 - 2¹ = 1325020219 is a prime.

It is a super-3 number, since 3×1325020221³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1325020194 and 1325020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325020201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 499441 + ... + 502086.

It is an arithmetic number, because the mean of its divisors is an integer number (95145160).

Almost surely, 2^1325020221 is an apocalyptic number.

It is an amenable number.

1325020221 is a deficient number, since it is larger than the sum of its proper divisors (958463619).

1325020221 is a wasteful number, since it uses less digits than its factorization.

1325020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001550 (or 1001537 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1325020221 is about 36400.8272021392. The cubic root of 1325020221 is about 1098.3502048129.

Adding to 1325020221 its reverse (1220205231), we get a palindrome (2545225452).

The spelling of 1325020221 in words is "one billion, three hundred twenty-five million, twenty thousand, two hundred twenty-one".